Glacier Diesel Power | 2007.5-2018 Dodge Ram 6.7L Cummins 12MM To 1/2 Inch Pushlock CP3 Inlet Adapter

Glacier Diesel Power 2007.5-2018 Dodge Ram 6.7L Cummins 12mm to 1/2" Push-Lok CP3 Inlet Adapter | Big Line Fuel System Upgrade

Description

As horsepower increases, the factory fuel supply system can become a restriction. While many owners upgrade to larger lift pumps, the final connection into the CP3 injection pump is often overlooked. If you're converting your truck to 1/2-inch fuel line, you'll need the correct fitting to connect directly to the CP3 inlet.

The Glacier Diesel Power 12mm to 1/2" Push-Lok CP3 Inlet Adapter is engineered specifically for 2007.5-2018 Ram 6.7L Cummins engines equipped with a CP3 injection pump. This precision-machined adapter threads directly into the CP3 using the factory 12mm inlet while providing a secure 1/2-inch Push-Lok hose connection for aftermarket fuel systems including AirDog®, FASS®, and custom fuel delivery systems.

Whether you're building a high-horsepower street truck, a dedicated towing rig, or simply upgrading your fuel system for improved reliability, this adapter provides a clean, leak-free transition to larger fuel plumbing.

Features

• Precision-machined adapter
• Fits 2007.5-2018 Ram 6.7L Cummins with CP3 injection pump
• Factory 12mm CP3 inlet threads
• 1/2" Push-Lok hose connection
• Compatible with AirDog®, FASS®, and custom lift pump systems
• Supports high-flow fuel system upgrades
• Easy installation
• Corrosion-resistant construction
• Leak-free design when installed properly

Why Upgrade to 1/2" Fuel Line?

A fuel system is only as efficient as its smallest restriction.

Many aftermarket lift pumps are capable of supplying significantly more fuel than the factory plumbing can comfortably deliver. While larger pumps improve fuel volume, restrictions near the CP3 inlet can still limit flow—especially in trucks producing substantially more horsepower than stock.

Upgrading to 1/2-inch fuel line reduces restriction throughout the supply side of the system and helps ensure the CP3 has access to a steady supply of fuel under heavy load. This is particularly beneficial for trucks equipped with larger injectors, upgraded CP3 pumps, dual fueler systems, or aggressive tuning.

Fuel System Tech Tip

The CP3 injection pump depends on a consistent supply of clean, unrestricted fuel.

If the inlet becomes restricted, the pump must work harder to draw fuel, increasing the risk of low supply pressure during high-demand situations such as towing, racing, or wide-open throttle acceleration.

While this adapter doesn't increase fuel pressure by itself, it removes one potential restriction when combined with properly sized fuel hose and a quality lift pump system.

For best results, match this adapter with:

• 1/2" fuel hose
• High-flow fuel filters
• High-flow fuel fittings
• A properly sized lift pump

Building the entire fuel system around the same flow capacity helps eliminate bottlenecks that can reduce performance.

Common Uses

• AirDog fuel system installations
• FASS fuel system upgrades
• Custom lift pump systems
• Big line fuel conversions
• High-horsepower diesel builds
• Competition trucks
• Heavy towing applications
• Preventative fuel system upgrades

Applications

• 2007.5 Ram 2500 6.7L Cummins
• 2007.5 Ram 3500 6.7L Cummins
• 2008 Ram 2500 6.7L Cummins
• 2008 Ram 3500 6.7L Cummins
• 2009 Ram 2500 6.7L Cummins
• 2009 Ram 3500 6.7L Cummins
• 2010 Ram 2500 6.7L Cummins
• 2010 Ram 3500 6.7L Cummins
• 2011 Ram 2500 6.7L Cummins
• 2011 Ram 3500 6.7L Cummins
• 2012 Ram 2500 6.7L Cummins
• 2012 Ram 3500 6.7L Cummins
• 2013 Ram 2500 6.7L Cummins
• 2013 Ram 3500 6.7L Cummins
• 2014 Ram 2500 6.7L Cummins
• 2014 Ram 3500 6.7L Cummins
• 2015 Ram 2500 6.7L Cummins
• 2015 Ram 3500 6.7L Cummins
• 2016 Ram 2500 6.7L Cummins
• 2016 Ram 3500 6.7L Cummins
• 2017 Ram 2500 6.7L Cummins
• 2017 Ram 3500 6.7L Cummins
• 2018 Ram 2500 6.7L Cummins
• 2018 Ram 3500 6.7L Cummins

Important Notes

• Fits 2007.5-2018 Ram 6.7L Cummins equipped with a factory-style CP3 injection pump.
• Converts the factory 12mm CP3 inlet to a 1/2-inch Push-Lok hose connection.
• Designed for use with 1/2-inch Push-Lok fuel hose.
• Compatible with many AirDog®, FASS®, and custom fuel systems.
• Always lubricate O-rings before installation and inspect for leaks after priming the fuel system.

Fuel System Failure Point

One of the most common mistakes when upgrading a diesel fuel system is installing a high-flow lift pump while leaving restrictive fittings elsewhere in the system. Fuel must travel through every hose, fitting, filter, and adapter before it reaches the CP3. A single undersized fitting can reduce the benefits of an otherwise high-capacity fuel system.

The Glacier Diesel Power 12mm to 1/2" Push-Lok CP3 Inlet Adapter eliminates one of those restrictions by allowing a full-size 1/2-inch fuel hose to connect directly to the CP3 inlet. It's a simple upgrade that complements larger lift pumps and high-flow fuel plumbing, helping create a more balanced fuel delivery system.

Complete Your High-Flow Fuel System

For maximum performance and reliability, pair this adapter with other Glacier Diesel Power fuel system upgrades:

• High-Flow 12mm Banjo Bolt
• High-Flow Banjo Fittings
• 1/2" Fuel Pressure Sender Tee
• Fuel Return Manifold
• 6AN and 8AN CP3 Adapters
• Fuel Pressure Test Fittings

Building the entire system with properly matched fittings and larger fuel lines helps eliminate restrictions from the tank all the way to the CP3 injection pump, providing more consistent fuel delivery for stock, towing, and high-performance applications.